Understanding Python’s and/or Operator Precedence with Practical Examples

1. Introduction

In a recent Python community discussion a user asked about the precedence of the and and or operators. This article shares the explanation and examples.

2. Solution

In Python, without parentheses, and has higher precedence than or. Therefore expressions are evaluated left‑to‑right, computing and first, then or.

For example, the expression evaluates the and part first, producing False, and then combines it with or to yield True.

and 和 or 还有个很有意思的用法：

print(1 and '字符串')
# 输出：字符串
# 原理：x and y 的值只可能是x或y。x为真就是y, x为假就是x

print(0 or '字符串')
# 输出：字符串
# 原理：x or y 的值只可能是x或y。x为真就是x, x为假就是y

3. Summary

The article clarifies that and takes precedence over or in Python, demonstrates the evaluation with concrete code, and provides additional tips on how these operators return one of their operands.